[Amps] RE MLA-2500

Gudguyham at aol.com Gudguyham at aol.com
Tue May 19 18:17:57 PDT 2009

The only way for a step start resistor to burn up is to have the step start 
 relay NOT engage or the contacts are bad.  Now that you report this, it  
sounds like a bad tube.  You said in the beginning that the amp was OK  
without tubes inserted, then when you inserted the tubes the step start resistor  
burned.  You had 2 problems, the step start circuit and a bad tube.   Now 
you have a bad tube that caused the power supply to go.  It did not go  
before because the step start resistor limited the current on the primary of the  
transformer and it burned up before the power supply blew.  Looks like you  
need a tube or two?
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